Portal or Portal 2 mods on Steam is installed by first Downloading it and extracting it. Then copy the map file into your Portal 2 maps folder which is Run the game.
Yes and Portal 2.
Portal - 2002 Portal 2-21 was released on: USA: 18 November 2003
No, Portal is for PC only. Portal 2 is for PS3,Xbox 360,and PC. Plus it would suck on PSP.
Portal 2
its from the game portal and portal 2
Wait for Portal 2.
It will be on Mac the day Portal 2 is released.
Portal 2 comes out on April 18, 2011.
yes there is a smaller portal of power for the 3ds game Skylanders you have too buy the game and it will come with a mini portal. P.S. don't forget too buy some Skylanders! :)
You cannot get a demo for Portal 2, and if there were it would be on Steam as Valve (the creators of Portal 2) distribute all their games there exclusively. However, if you haven't played the first Portal game I would recommend it, and if you like it you'll be sure to love Portal 2!
The voice of Wheatley In Portal 2 is Stephen Merchant.